Re: AE accelerator Board

[pubpc1@library.ucla.edu]

John <Johnny.5@worldnet.att.net> wrote:
>>John <Johnny.5@worldnet.att.net> wrote:
>>>I have an Applied Engineering accelerator card running at 7 mhz. Do
>>>they make a 15 mhz chip that will work in it's place and where can
>>>I get one?
>>>
>>>John...
>
>>John, Alltech Electronics (http://www.allelec.com/) carries them
>>for about $20.  They are listed as 65C816-14MHz in their catalog.
>>You will also need a half-size oscillator.  Digi-Key
>>(http://www.digikey.com/) has them.  You need an oscillator four
>>times the speed that you want your Transwarp GS to run (for example,
>>if you want 10MHz speed, you will need a 40MHz oscillator, and so on).
>
>Is this all there is to it? I was told you need an optional cache board and
>cut some lan connections. If all you need is the chip and oscillator I'll buy
>it. Please let me know if this has been done like this before.
>
>John...
>


For CPU acceleration, you only need the CPU and oscillator.  You
need to cut the trace only if you want to add more cache RAM.  The
two upgrades are independent.

The older engineering grade 65C816 chips required a ROM upgrade
that provided special delays for some 16-bit instructions.  The
newer 65C816-14MHz from WDC or Alltech, however, does not need the
ROM or GAL upgrades at all.

-Scott G.